Ii oast-metal oases foe speiig-balanoes



@uitrit 'tats gettati @fitter JOHN CHATILIJN, OF NEW YORK, N. Y.

Letters .Patent No. 71,980, dated Decemer 10, 1867.

IMPROVEMENT IN GAST-METAL GASES FOR SPRING-BALANGES.

TO ALL WHOM IT MAY CONCERN:

Beit known that I, JOHN CHATILLON, of the city,` county, and State ofNew York, have invented a new and improved Cast-Metal Case forSpring-Balances; and I do hereby declare that thefollowng is a full,clear, and enact description thereof, which will` enable others skilledin the art to make and use the same, reference being had to theaccompanying drawings, forming a part of this specification, in Which-Figure 1 represents a front view of my improved case forspring-balances. Figure 2 is a vertical transverse section of the same.k Figure 3 is a front view of the ordinary cases now iu use.

Similar letters of reference indicate corresponding parts. v fj Thisinvention relates to a new manner of arranging'the cast-metal cases forspring-balances, so that they \can be made less expensive and simplerthan any non' made; and consists in fitting the pin, to which' the uppervend of the spring is secured, directly through Athe upper head of thecase, instead of using an additional head in the case for that purpose.Thereby I am enabled to use a shorter case, which will be liable to holda spring of the samelength as the longer cases with the double upperheads now used; and I consequently economize metal in the manufacture ofmy cases, which is of great importance, when the great number ofspring-balances made is considered. I I A represents a cast-metal casefor a spring-balanc e, made of suitable material, and of ordinary shape,but

made without the additional head a, which is used in'the ordinary casesfor holding the pin In), as shown in tig. 3. The object of the pin b istovhold the upperl end of the spring to which the weight is attached. Inmy improved case, theupper head a is slotted or perforated, and the pinb is inserted from above or from the side of its head, covering theperforation, as is clearly shown in tig. 2. It will be seen, that7 toaccommodate a spring ofequal length as that used in the ordinary case,my case need only be as long from end to end as the old caseis from thelower end to the partition a, and thus, the material necessary for theupper part of the ordinary case, is economized in the manufacture of myimproved cases. d is the bow or perforated lug, projecting from theupper head c, in theordiuary or in any suitable manner. It will benoticed that my improved case, with both heads and with the lug d, iscast of' one piece.

I claim as new, and desire to secure by Letters Patent-v A cast-metalcase for spring-balances, when provided with aperforated or slottedupper head for the reception of the pin b, and when made substantiallyas and for the purpose herein shown and described.'

JOHN CHATILLON. Witnesses:

WM. F. McNAMAnA, ALEX. F. ROBERTS.

